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An A-D-A′-D-A type unfused nonfullerene acceptor for organic solar cells with approaching 14% efficiency

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Abstract

In recent years, power conversion efficiency (PCE) of organic solar cells (OSCs) has made significant improvement. A large number of studies were reported to achieve high PCEs through exploring new active layer materials, especially the high efficiency fused ring acceptors (FRAs). Compared with FRAs, another type of so-called unfused-ring acceptors (UFAs), possessing some advantages such as simple synthesis and low cost, have attracted a lot of attention. Herein, a new UFA BTzO-4F, incorporating with a benzotriazole moiety and S⋯O intramolecular noncovalent interactions, has been successfully synthesized. The photovoltaic device based on PBDB-T:BTzO-4F achieved a record PCE of 13.8% for UFAs, which indicates that introducing the benzotriazole moiety is an effective strategy for high quality acceptors. Thus, these findings of this work demonstrate the great potential of UFAs for high performance OSCs.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (21774130, 51925306), the National Key R&D Program of China (2018FYA 0305800), the Key Research Program of Frontier Sciences, CAS (QYZDB-SSW-JSC046), Key Research Program of the Chinese Academy of Sciences (XDPB08-2), the Strategic Priority Research Program of Chinese Academy of Sciences (XDB28000000), the International Partnership Program of Chinese Academy of Sciences (211211KYSB20170014), and China Postdoctoral Science Foundation (2020M670425). DFT results described in this short communication are obtained on the National Supercomputing Center in Shenzhen (Shenzhen Cloud Computing Center).

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  1. These authors contributed equally to this work.

Authors and Affiliations

  1. College of Materials Science and Opto-Electronic Technology, Center of Materials Science and Optoelectronics Engineering, CAS Center for Excellence in Topological Quantum Computation, CAS Key Laboratory of Vacuum Physic, University of Chinese Academy of Sciences, Beijing, 100049, China

    Xingzheng Liu, Yanan Wei, Xin Zhang, Linqing Qin & Hui Huang

  2. CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, China

    Zhixiang Wei

Authors
  1. Xingzheng Liu
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  2. Yanan Wei
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  3. Xin Zhang
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  4. Linqing Qin
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  5. Zhixiang Wei
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  6. Hui Huang
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Correspondence to Xin Zhang or Hui Huang.

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The authors declare no conflict of interest.

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Liu, X., Wei, Y., Zhang, X. et al. An A-D-A′-D-A type unfused nonfullerene acceptor for organic solar cells with approaching 14% efficiency. Sci. China Chem. 64, 228–231 (2021). https://doi.org/10.1007/s11426-020-9868-8

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  • DOI: https://doi.org/10.1007/s11426-020-9868-8

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